public void Invoke(IScheduler scheduler)
{
//
// Protect against possible maltreatment of the scheduler queues or races in
// execution of a work item that got relocated across system clock changes.
// Under no circumstance whatsoever we should run work twice. The monitor's
// ref count should also be subject to this policy.
//
if (Interlocked.Exchange(ref _hasRun, 1) == 0)
{
try
{
if (!Disposable.GetIsDisposed(ref _disposable))
{
Disposable.SetSingle(ref _disposable, InvokeCore(scheduler));
}
}
finally
{
SystemClock.Release();
}
}
}
private bool IsDisposed()
{
return(Disposable.GetIsDisposed(ref _upstream));
}
bool IsDisposed()
{
return(Disposable.GetIsDisposed(ref upstream));
}